Cleaning type stop valve

Abstract

A sealing column matched with a valve seat opening is arranged in the center of the bottom of a valve element, a sealing ring table is arranged on the periphery of the bottom of the valve element, the inner periphery of the sealing ring table is matched with the outer peripheral wall of a valve seat, and a first sealing ring corresponding to the outer wall of the valve seat is arranged on the lower surface of the sealing ring table; according to the cleaning type stop valve, a sealing column is arranged in the center of the bottom of a valve element, and a sealing ring table is arranged on the periphery; in the process that the valve rod is matched with the valve seat, the outer wall of the valve seat can be cleaned through the first sealing ring, and therefore when the sealing ring table of the valve element is combined with the valve seat, the contact face cannot be damaged by impurities; when the sealing ring table is matched with the outer wall of the valve seat, the inner circumference of the sealing ring table and the outer circumferential wall of the valve seat are matched and also in a frustum shape, better sealing can be formed between the sealing ring table and the valve seat, and the sealing column and a valve seat opening form auxiliary sealing. The lower surface of the valve element is in clearance fit with the upper surface of the valve seat, so that structural damage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of globe valves, in particular to a clean globe valve. Background Art

[0002] A globe valve is a valve used to control the flow of fluids. Its main function is to open or close the fluid passage. A globe valve usually consists of a valve body, a valve core (valve flap) and an operating mechanism. When the valve core is fully opened, the fluid can pass through freely; when the valve core is closed, the fluid flow will be completely blocked. Globe valves are widely used in industrial, building and household piping systems to control the flow of water, steam, gas or other fluids.

[0003] The valve core and the valve seat are generally combined and separated in the height direction. Then, during the opening and closing of the valve, particulate impurities in the fluid medium may damage the valve core and the valve seat, thereby affecting the sealing effect of the entire globe valve. Changing the sealing direction from the axial direction to the circumferential direction is a common method, but there are also problems with poor sealing effect. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a clean globe valve, aiming to solve the problem that during the operation of the globe valve, particulate impurities in the fluid medium may damage the valve core and the valve seat during the opening and closing of the valve, thereby affecting the sealing effect of the entire globe valve.

[0005] To achieve the above purpose, the utility model provides a clean globe valve, including:

[0006] A valve body, with a flow channel running through it in the length direction, and the two ends of the flow channel are respectively an inlet channel and an outlet channel. A ring-shaped valve seat is arranged in the middle of the flow channel. A valve cover mounting opening corresponding to the valve seat is arranged on the outer wall of the valve body. Among them, the valve seat protrudes in the direction of the valve cover mounting opening in the height direction, and the outer peripheral wall of the valve seat is a tapered frustum with a gradually decreasing diameter. The middle part of the valve seat is a cylindrical valve seat opening, and a ring-shaped groove is formed between the valve seat and the valve body;

[0007] A valve cover, detachably connected to the valve cover mounting opening;

[0008] A valve stem assembly, including a valve stem and a valve core. The valve stem is movably arranged in the valve cover in the length direction. The valve core is connected to the inner end of the valve stem and corresponds to the valve seat. A sealing column matching the valve seat opening is arranged at the center of the bottom of the valve core. A sealing ring platform is arranged on the outer periphery of the bottom of the valve core. The inner periphery of the sealing ring platform is matched with the outer peripheral wall of the valve seat. A first sealing ring is arranged on the lower surface of the sealing ring platform corresponding to the outer wall of the valve seat, and the inner periphery of the first sealing ring extends beyond the sealing ring platform;

[0009] Wherein, when the sealing ring platform cooperates with the outer wall of the valve seat, the lower surface of the valve core and the upper surface of the valve seat are in clearance fit, and the sealing column is sealed with the valve seat opening.

[0010] Further, the included angle between the valve seat and the vertical direction is 1 to 5 degrees.

[0011] Further, a connecting groove communicates between the groove ring and the outflow channel.

[0012] Further, the groove ring has a downward inclination trend in the direction pointing to the connecting groove.

[0013] Further, when the sealing ring platform cooperates with the outer wall of the valve seat, the lower surface of the first sealing ring is combined with the bottom of the groove ring.

[0014] Further, a second sealing ring is connected between the bottom of the valve core and the sealing column.

[0015] Further, a bellows is provided on the valve stem, and both ends of the bellows are respectively connected to the valve stem and the valve cover.

[0016] Further, the connection method between the valve cover and the valve cover mounting port is a flange.

[0017] Further, the materials of the first sealing ring and the second sealing ring are both polyurethane.

[0018] Further, the valve seat is detachably connected to the valve body.

[0019] For the clean globe valve provided by the present utility model, a sealing column is arranged at the center of the bottom of the valve core, and a sealing ring platform is arranged on the outer periphery; during the process of the valve stem and the valve seat forming a fit, the first sealing ring can clean the outer wall of the valve seat, so that when the sealing ring platform of the valve core is combined with the valve seat, no impurities will damage the contact surface; when the sealing ring platform cooperates with the outer wall of the valve seat, the inner circumference of the sealing ring platform and the outer peripheral wall of the valve seat are matched and also in the shape of a frustum of a cone, and a better seal can be formed between the two, and the sealing column and the valve seat opening form an auxiliary seal; the lower surface of the valve core and the upper surface of the valve seat are in clearance fit and no structural damage will occur. Description of the Drawings

[0020] Figure 1 is a three-dimensional schematic diagram of the clean globe valve according to the first embodiment of the present utility model;

[0021] Figure 2 is a cross-sectional schematic diagram of the valve body in the clean globe valve according to the first embodiment of the present utility model;

[0022] Figure 3It is a schematic cross-sectional view of the clean globe valve in the first embodiment of the present utility model (in the conducting state);

[0023] Figure 4 It is a schematic cross-sectional view of the clean globe valve in the first embodiment of the present utility model (in the closed state);

[0024] Figure 5 It is a schematic view of the valve stem assembly in the clean globe valve of the first embodiment of the present utility model;

[0025] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0026] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", "above-mentioned" and "this" used herein may also include the plural forms. It should be further understood that the term "including" used in the description of the present utility model means the presence of the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0028] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0029] Referring to Figures 1 to 5 , in an embodiment of the present utility model, a clean globe valve includes:

[0030] The valve body 100 has a flow passage that penetrates in the length direction and has an inlet passage 110 and an outlet passage 120 at both ends respectively. A ring-shaped valve seat 130 is provided in the middle of the flow passage. A valve cover mounting opening 140 corresponding to the valve seat 130 is provided on the outer wall of the valve body 100. Among them, in the height direction of the valve seat 130, it protrudes in the direction of the valve cover mounting opening 140 and the outer peripheral wall is a tapered frustum shape that tapers. The middle part of the valve seat 130 is a cylindrical valve seat opening 131, and a ring-shaped groove ring 150 is formed between the valve seat 130 and the valve body 100;

[0031] The valve cover 200 is detachably connected to the valve cover mounting opening 140;

[0032] The valve stem assembly 300 includes a valve stem 310 and a valve core 320. The valve stem 310 is movably arranged in the valve cover 200 along the length direction. The valve core 320 is connected to the inner end of the valve stem 310 and corresponds to the valve seat 130. A sealing column 321 matching the valve seat opening 131 is provided at the center of the bottom of the valve core 320. A sealing ring platform 322 is provided on the outer periphery of the bottom of the valve core 320. The inner periphery of the sealing ring platform 322 is matched with the outer peripheral wall of the valve seat 130. A first sealing ring 323 corresponding to the outer wall of the valve seat 130 is provided on the lower surface of the sealing ring platform 322, and the inner periphery of the first sealing ring 323 extends beyond the sealing ring platform 322;

[0033] Among them, when the sealing ring platform 322 is matched with the outer wall of the valve seat 130, the lower surface of the valve core 320 and the upper surface of the valve seat 130 are in clearance fit, and the sealing column 321 is sealed with the valve seat opening 131.

[0034] In the prior art, the valve core and the valve seat are generally combined and separated in the height direction. Then, during the opening and closing of the valve, particulate impurities in the fluid medium may damage the valve core and the valve seat, thereby affecting the sealing effect of the entire globe valve; changing the sealing direction from vertical to circumferential is a common means, but there is also a problem of poor sealing effect.

[0035] In the present utility model, a flow passage that penetrates in the length direction of the valve body 100 has an inlet passage 110 and an outlet passage 120 at both ends respectively. A ring-shaped valve seat 130 is provided in the middle of the flow passage. A valve cover mounting opening 140 corresponding to the valve seat 130 is provided on the outer wall of the valve body 100. In the height direction of the valve seat 130, it protrudes in the direction of the valve cover mounting opening 140 and the outer peripheral wall is a tapered frustum shape that tapers. The valve seat 130 and the valve body 100 are of an integral structure or a connection structure. The middle part of the valve seat 130 is a cylindrical valve seat opening 131, and a ring-shaped groove ring 150 is formed between the valve seat 130 and the valve body 100.

[0036] The valve cover 200 is detachably connected to the valve cover mounting port 140. The connection method between the valve cover 200 and the valve cover mounting port 140 can be flange, thread, etc.

[0037] The valve stem assembly 300 includes a valve stem 310 and a valve core 320. The driving method of the valve stem assembly 300 can be electric motor or manual. The sealing method between the valve stem 310 and the valve cover 200 is not the focus, referring to the existing common settings. The valve stem 310 is movably arranged in the valve cover 200 along the length direction. The valve core 320 is connected to the inner end of the valve stem 310 and corresponds to the valve seat 130. A sealing column 321 matching the valve seat opening 131 is arranged at the center of the bottom of the valve core 320. When the two are combined, a circumferential seal is formed. The fluid entering the channel 110 will not pass through the valve core 320. A sealing ring platform 322 is arranged on the outer periphery of the bottom of the valve core 320. The inner periphery of the sealing ring platform 322 forms a match with the outer peripheral wall of the valve seat 130, and is also in the shape of a frustum of a cone, and the shapes correspond, so that a better seal can be formed between the two. A first sealing ring 323 corresponding to the outer wall of the valve seat 130 is arranged on the lower surface of the sealing ring platform 322. The inner periphery of the first sealing ring 323 extends beyond the sealing ring platform 322. When the valve stem 310 and the valve seat 130 are in cooperation, the first sealing ring 323 can clean the outer wall of the valve seat 130. Thus, when the sealing ring platform 322 of the valve core 320 is combined with the valve seat 130, no impurities will damage the contact surface.

[0038] When the sealing ring platform 322 cooperates with the outer wall of the valve seat 130, the lower surface of the valve core 320 and the upper surface of the valve seat 130 are in clearance fit, and the upper surface of the valve seat 130 will not cause structural damage to the valve core 320. The sealing column 321 is sealed with the valve seat opening 131, and thus an auxiliary seal is formed at the position of the sealing ring platform 322.

[0039] In summary, a sealing column 321 is arranged at the center of the bottom of the valve core 320, and a sealing ring platform 322 is arranged on the outer periphery; when the valve stem 310 and the valve seat 130 are in cooperation, the first sealing ring 323 can clean the outer wall of the valve seat 130, so that when the sealing ring platform 322 of the valve core 320 is combined with the valve seat 130, no impurities will damage the contact surface; when the sealing ring platform 322 cooperates with the outer wall of the valve seat 130, the inner periphery of the sealing ring platform 322 forms a match with the outer peripheral wall of the valve seat 130 and is also in the shape of a frustum of a cone, and a better seal can be formed between the two, and the sealing column 321 forms an auxiliary seal with the valve seat opening 131; the lower surface of the valve core 320 and the upper surface of the valve seat 130 are in clearance fit and no structural damage will occur.

[0040] In one embodiment, the included angle between the valve seat 130 and the vertical direction is 1 to 5 degrees.

[0041] In this embodiment, considering that the larger the angle between the valve seat 130 and the vertical direction, the easier it is for impurities to remain on the outer wall of the valve seat 130, and too small an angle is not conducive to the sealing effect, it is therefore limited to 1 to 5 degrees.

[0042] Referring to Figures 2 to 4 , in one embodiment, a connecting groove 151 communicates between the groove ring 150 and the outflow channel 120.

[0043] In this embodiment, through the connecting groove 151, the impurities retained in the groove ring 150 can easily enter the outflow channel 120 through the connecting groove 151, and the probability of the entire globe valve working properly under complex working conditions is increased.

[0044] In one embodiment, the groove ring 150 has a downward inclination in the direction pointing to the connecting groove 151.

[0045] In this embodiment, since the globe valve is generally placed horizontally during use, the groove ring 150 is set to be non-horizontal, specifically inclined downward in the direction of the connecting groove 151, so that the fluid in the groove ring 150 is more likely to flow in the direction of the connecting groove 151. During this process, impurities will also flow into the outflow channel 120 through the connecting groove 151 along with the fluid.

[0046] In one embodiment, when the sealing ring platform 322 cooperates with the outer wall of the valve seat 130, the lower surface of the first sealing ring 323 is combined with the bottom of the groove ring 150.

[0047] In this embodiment, the first sealing ring 323 not only plays a role in cleaning the outer wall of the valve seat 130, but also forms a seal with the groove ring 150, thereby improving the sealing effect of the entire globe valve. The material of the first sealing ring 323 can be polyurethane, a high polymer that is weather-resistant and has a considerable structural strength.

[0048] Referring to Figures 2 to 5 , in one embodiment, a second sealing ring 400 is connected between the bottom of the valve core 320 and the sealing column 321 within the sealing ring platform 322.

[0049] In this embodiment, when the sealing ring platform 322 cooperates with the outer wall of the valve seat 130, the lower surface of the valve core 320 and the upper surface of the valve seat 130 are in clearance fit, but the second sealing ring 400 is clamped between the valve core 320 and the valve seat 130, thereby forming a sealing effect. The material of the second sealing ring 400 can be polyurethane, a high polymer that is weather-resistant and has a considerable structural strength. The installation method of the second sealing ring 400 on the valve core 320 can be bonding or mechanical connection.

[0050] Referring to Figures 3 to 5, in one embodiment, a bellows 500 is provided on the valve stem 310, and two ends of the bellows 500 are respectively connected to the valve stem 310 and the valve cover 200.

[0051] In this embodiment, by introducing the bellows 500, the sealing effect between the positions of the valve stem 310 and the valve cover 200 is improved. Specifically, the connection manner of the bellows 500 can be mechanical connection or welding.

[0052] In one embodiment, the connection manner between the valve cover 200 and the valve cover mounting port 140 is a flange.

[0053] In this embodiment, a relatively simple connection manner is provided, which is convenient for the installation and disassembly of the valve cover 200.

[0054] In one embodiment, the materials of both the first sealing ring 323 and the second sealing ring 400 are polyurethane.

[0055] In this embodiment, the weather resistance and structural strength of polyurethane are utilized to complete the sealing function.

[0056] In one embodiment, the valve seat 130 is detachably connected to the valve body 100.

[0057] In this embodiment, if the connection manner of the valve seat 130 is set to be detachable, then its material selection can be optimized relative to the valve body 100 (such as using cemented carbide alone), which is also convenient for forming and maintenance. The preferred installation manner is threaded connection.

[0058] In summary, for the clean globe valve provided by the present utility model, a sealing column 321 is provided at the center of the bottom of the valve core 320, and a sealing ring platform 322 is provided on the outer periphery; when the valve stem 310 and the valve seat 130 are in cooperation, the first sealing ring 323 can clean the outer wall of the valve seat 130, so that when the sealing ring platform 322 of the valve core 320 is combined with the valve seat 130, no impurities will damage the contact surface; when the sealing ring platform 322 is in cooperation with the outer wall of the valve seat 130, the inner circumference of the sealing ring platform 322 and the outer peripheral wall of the valve seat 130 are also in a tapered shape to form a better seal, and the sealing column 321 and the valve seat opening 131 form an auxiliary seal; the lower surface of the valve core 320 and the upper surface of the valve seat 130 are in clearance fit and no structural damage will occur.

[0059] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A clean type globe valve, characterized in that, Comprising: A valve body (100) has a flow passage that penetrates in the length direction and has an inlet passage (110) and an outlet passage (120) at both ends respectively. A ring-shaped valve seat (130) is provided in the middle of the flow passage. A valve cover mounting port (140) corresponding to the valve seat (130) is provided on the outer wall of the valve body (100). Among them, in the height direction of the valve seat (130), it protrudes in the direction of the valve cover mounting port (140) and the outer peripheral wall is a tapered frustum shape that tapers. The middle of the valve seat (130) is a cylindrical valve seat opening (131). A ring-shaped groove ring (150) is formed between the valve seat (130) and the valve body (100); A valve cover (200) is detachably connected to the valve cover mounting port (140); A valve stem assembly (300) includes a valve stem (310) and a valve core (320). The valve stem (310) is movably arranged in the valve cover (200) along the length direction. The valve core (320) is connected to the inner end of the valve stem (310) and corresponds to the valve seat (130). A sealing column (321) matching the valve seat opening (131) is provided at the center of the bottom of the valve core (320). A sealing ring platform (322) is provided on the outer periphery of the bottom of the valve core (320). The inner periphery of the sealing ring platform (322) matches the outer peripheral wall of the valve seat (130). A first sealing ring (323) corresponding to the outer wall of the valve seat (130) is provided on the lower surface of the sealing ring platform (322). The inner periphery of the first sealing ring (323) extends beyond the sealing ring platform (322); Among them, when the sealing ring platform (322) cooperates with the outer wall of the valve seat (130), the lower surface of the valve core (320) and the upper surface of the valve seat (130) are in clearance fit, and the sealing column (321) seals with the valve seat opening (131).

2. The clean shut-off valve according to claim 1, wherein The included angle between the valve seat (130) and the vertical direction is 1 to 5 degrees.

3. The clean cut-off valve according to claim 1, wherein, A connecting groove (151) communicates between the groove ring (150) and the outlet passage (120).

4. The clean type globe valve according to claim 3, characterized in that, The groove ring (150) has a downward inclination trend in the direction pointing to the connecting groove (151).

5. The clean type globe valve according to claim 3, characterized in that, When the sealing ring platform (322) cooperates with the outer wall of the valve seat (130), the lower surface of the first sealing ring (323) combines with the bottom of the groove ring (150).

6. The clean cut-off valve according to claim 1, wherein A second sealing ring (400) is connected between the bottom of the valve core (320) between the sealing ring platform (322) and the sealing column (321).

7. The clean shut-off valve according to any one of claims 1 to 6, characterized in that, A bellows (500) is provided on the valve stem (310), and both ends of the bellows (500) are respectively connected to the valve stem (310) and the valve cover (200).

8. The clean cut-off valve according to any one of claims 1 to 6, characterized in that The connection method between the valve cover (200) and the valve cover mounting port (140) is a flange.

9. The clean type globe valve according to claim 6, characterized in that, The materials of the first sealing ring (323) and the second sealing ring (400) are both polyurethane.

10. The clean cut-off valve according to any one of claims 1 to 6, characterized in that, The valve seat (130) is detachably connected to the valve body (100).

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